I have been very happy with my Atlantic arch. I installed it a couple of years ago and it has been to Baja
and back, over 3000 miles total. However, it just failed today, falling off the back of my boat. I believe that the arch is plenty strong, but the 1/4" mounting bolts are too small, and sheared off on one of the legs, causing the whole thing to fall.
I am not slamming Atlantic towers, as I said, the tower is plenty strong. I would go up in size on the fasteners that secure the pads to the hull
. Check my thread about it.